convenience vs comfortableness

convenience and comfortableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
convenience	Yes	No	No	No
comfortableness	Yes	No	No	No

As nouns, comfortableness is a hypernym of convenience; that is, comfortableness is a word with a broader meaning than convenience:

Other hypernyms of convenience include comfort.

convenience (noun)	comfortableness (noun)
a device or control that is very useful for a particular job	a feeling of being at ease in a relationship
a toilet that is available to the public	a state of being relaxed and feeling no pain
the quality of being useful and convenient
the state of being suitable or opportune